How much should a spring of indefinite length be compressed to have a potential energy equivalent to a ball of mass 6 kg raised to a height of 120 m above the ground? Let the spring have a stiffness of k = 100 N/m and assume g = 10 m/s2.

MCQs on work, energy and power basics, work energy theorem, kinetic energy, friction, potential energy, variable force, spring potential energy, energy conservation law, power, collision and mechanical energy conservations.